| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] at [noun sg] | 3282 |
|
| 2 | back at [noun sg] | 306 |
|
| 3 | [vb pp] back at | 105 |
|
| 4 | [vb pp] back [noun sg] | 36 |
|
